Tern Eclipse P20

Product Description

The Eclipse P20 is a high-performance road bike that folds down fast. With custom 26” Rolf Paired Spoke wheels, a 250 mm Physis™ 3D handlepost, and performance-tuned frame geometry, the Eclipse P20 is engineered for speed. It sports a stealth black finish, hydraulic disc brakes, and hidden design perks like the BioLogic Arx grips with an integrated multi-tool.

  • Kinetix™ Pro Disc 26” wheels with patented Rolf Paired Spoke design
  • Shimano Tiagra drivetrain for 20 speeds and precise, responsive shifting
  • Tektro Auriga hydraulic disc brakes for all-weather stopping power
  • Adjustable VRO handlebar stem to fine tune your ride position
  • BioLogic Arx™ grips with a hidden multi-tool
  • High performance Kojak road tires with puncture protection
  • Folds compactly in 10 seconds for storage and transport

Tech Specs


WHEEL SIZE: 26" wheels

SPEEDS: 2 x 10

WEIGHT: 12.22 kg (26.9 lb)

FOLDING SIZE: 38 x 90 x 81 cm (15" x 35.4" x 31.9")



GEAR INCHES: 26" - 112" (2.09 - 8.92 m)

DISTANCE: SEATPOST TO HANDLEBAR: Min: 630 mm (24.8") Max: 700 mm (27.6")

DISTANCE: SADDLE TO PEDAL: Min: 770 mm (29.7") Max: 1040 mm (40.6")

SUGGESTED RIDER HEIGHT: 148 - 195 cm (4'10" - 6'5")

MAX LOAD WEIGHT: 105 kg (230 lb)


FRAME: Tern Eclipse, hydroformed 7005-AL w/ smooth TIG welding, OCL+ joint, 3 patented technologies

FORK: Tarsus, 6061-AL, hydroformed


HANDLEPOST: Tern Physis 3D (G2), 3D forged, 5 patented technologies, 12°, 250 mm

STEM: Syntace VRO, adjustable

HEADSET: Flux, cartridge bearings, Physis integrated

HANDLEBAR: Kinetix Comp, 6061-Al, VRO butted


SADDLE: Tern Porter+, patented GripPad design, PrimeGel padding

SEATPOST: SuperOversize, 6061-Al, forged clamp

SEATPOST CLAMP: Syntace OverLock


FRONT BRAKE: Tektro Auriga, hydraulic disc

REAR BRAKE: Tektro Auriga, hydraulic disc

BRAKE LEVERS: Tektro Auriga, hydraulic disc

BRAKE CABLE & HOUSING: Tektro Auriga, hydraulic


FRONT WHEEL: Kinetix Pro Disc, Paired Spoke technology, Shimano Centerlock, 20H

REAR WHEEL: Kinetix Pro Disc, Paired Spoke technology, Shimano Centerlock, 20H

SPOKES AND NIPPLES: Double-butted 18/10 stainless, Sapim Polyax nipples

TIRES: Schwalbe Kojak, 35-559, foldable, puncture protection, 95 psi


SHIFTER(S): Shimano Tiagra trigger, 2x10 spd



CRANKSET: FSA Vero, 50/34T

CASSETTE/FREEWHEEL: Shimano Deore, 11-32T, 10 spd

BOTTOM BRACKET: Cartridge, sealed bearings


PEDALS: LiteForm QR, alloy body, QR right/standard left

SHIFTER CABLE & HOUSING: Jagwire LEX-SL, slick treatment, alloy ferrules


BELL: Pitch, brass

KICKSTAND: Premium center mount

CLIP SYSTEM: Magnetix 2.0


REAR LIGHT: BioLogic TailLight

ACCESSORY: Pedal Holder


*Note: These are our standard model specifications. The bike's weight and folded dimension may not include racks and fenders. The specifications for your country may differ slightly. We do our best to ensure that the specifications listed here accurately reflect the exact parts found on our production bikes. However, component changes do occur for various reasons and there may be brief delays on site updates. We reserve the right to make component changes without prior notification, which may cause discrepancies with the information listed on the web.


OCL+™ Frame Joint


A heavy-duty update to our iconic OCL frame hinge, the OCL+ is built to exceed ISO 4210 and EN 15194 testing requirements. Leveraging the hinge design of the long-tail Tern Cargo Node, the OCL+ features a single-shaft design, advanced welding techniques, and robust gussets, so it stays stiff and strong during even the fastest commutes.

  • Stronger by DesignMaking the hinge taller and moving the pivoting surfaces outward from the center axis more than doubles overall strength and stiffness. It’s a difference you’ll feel from your very first ride.
  • Smooth OperationThe patented design puts four igus® bearings between the aluminum and stainless steel moving parts so the folding action is always smooth and friction-free.
  • Interlocking JointThe front and rear joint surfaces lock together to eliminate torsional movement.
  • Easy to UseLarge rounded surfaces on the lever and joint bodies are easy on your hands and allow good leverage for easy operation.
  • Doubly SafeClose the lever and the AutoLok™ automatically locks in place for extra, easy security.
  • Floating Point TechnologyPatented technology allows the lever to fold flat and brace against the joint for protection in transit.
  • ServiceableGood things are built to last and that’s why the OCL+ Joint is designed to be dealer serviceable. We keep every part in stock and if your bearings ever wear out, your dealer can replace them in a few minutes.
  • Precision-MachinedA machining tolerance of only 50 microns ensures a tight fit and eliminates looseness and rattling.
  • Stainless Steel HardwareCold-worked stainless delivers the durability and reliability needed for daily riding in all weather conditions.


N-Fold™ Technology


With N-Fold Technology, Tern bikes fold small and fast—in three easy steps. It’s simple enough for anybody to master. And with the handlepost folded to the outside of the package, Tern bikes can also roll when folded for easy transport.


DoubleTruss™ Technology


The rear half of Tern frames use a patented 3D structure we call DoubleTruss to build in extra stiffness. It helps resist torsional forces so our bikes flex less. That means increased stiffness and much better power transfer from the pedals to the rear wheel. The proof’s in the ride.


Tarsus™ Fork


Utilizing a single hydroformed tube mated to a precision-machined steerer, the Tarsus delivers superior strength in a shape that matches the sophisticated lines of the Verge and Eclipse frames.

  • Hydroformed TubingThe process of hydroforming aligns the grain structure and strengthens the aluminum material. It also minimizes welding in the most highly stressed area of the fork.
  • Internal Wire RoutingIf you decide to equip your Tarsus with a dynamo hub, it’s ready for internal cable routing, keeping the profile of your bike clean.


Physis™ 3D Handlepost


Five patented technologies and unique manufacturing technology add up to the strongest, stiffest folding handlepost available. The Physis uses a special manufacturing process called 3D forging, which forms the post from a single piece of aluminum, eliminating all welds.

  • No FlexTo eliminate flex, the Physis uses a massive joint knuckle and a post that gradually tapers from thick at the base to thin. Moreover, it has 150% more clamping height between the fork steerer and the handlepost than common designs.
  • Flux TechnologyThe base of the Physis is machined so it functions as the upper race of the headset. This patented direct integration contributes to the incredible stiffness of the design.
  • Interlocking HalvesJoint surfaces lock together to improve torsional stiffness. We've fine-tuned the shape to virtually eliminate squeaks.
  • Redundant Double BoltsTwo bolts clamp the Physis to the fork steerer for improved safety.
  • igus® BearingsThe patented design puts sliding bearings between the moving parts so the folding action is always smooth and friction-free.
  • Large, Smooth LeverLarge rounded surfaces are easy on your hands and provide good leverage for easy operation.
  • AutoLok TechnologyClose the lever and it automatically locks in place, for extra, easy security—using an aluminum pin.
  • Floating Point TechnologyPatented technology allows the lever to fold flat and brace against the joint for protection in transit.
  • SpringLock TechnologyPatented SpringLock technology holds the adjustment rod firmly in place so the locking lever is always properly tensioned and can never vibrate loose.
  • ServiceableGood things are built to last and that’s why the Physis is designed to be fully dealer serviceable. We keep every part in stock and replacing the bearings can be done in minutes.
  • TriSeal DesignThree rubber seals keep weather out and the headset bearings functioning smoothly.
  • Precision-MachinedA machining tolerance of only 50 microns ensures a tight fit and eliminates looseness and rattling.


Syntace VRO Stem


Your bike should adapt to fit you―not the other way around. This adjustable stem allows you to position your handlebars further, for a more stretched and aggressive riding position, or up higher for increased comfort.


Stems are 47mm in length and infinitely adjustable so you can find your perfect fit.

Syntace quality

Syntace is a boutique German company renowned for their best-in-class bicycle components that are selected by many champion professional riders. They are perhaps best known for their manic attention to detail and brutal testing standards.


Only 120 grams. 100% CNC machined from 6066 aluminum.


Two stems spaced widely apart means excellent torsional stiffness so go ahead and crank hard on your bars with confidence.


Porter+™ Saddle


We reengineered the underside of the age-old bike saddle into a comfortable grip and shoulder pad. Up top, the dual-density construction and gel cushioning will keep you comfortable on the road, and the impeccably finished vacuum construction makes the saddle waterproof and easy-to-clean. Down below, the GripPad™ on the underside of the saddle lets you grip the saddle nose with comfortable confidence when your rolling your folded bike.


Tektro Hydraulic Disk Brakes


When you’re going fast, in all sorts of weather conditions, you need brakes that work, and work well. Tektro hydraulics fit the bill with sure, single-finger stopping power.


Kinetix Pro Disc Wheels


Paired-spoke design allows us to build a strong wheel with fewer spokes—resulting in a lightweight, aerodynamic wheel for fast riding.

  • Rolf Paired Spoke™ TechnologyPaired Spoke lacing allows us to use fewer spokes at higher tensions, resulting in a wheel that is lighter, stronger, and more aerodynamic.
  • Double-Butted SpokesTo reduce weight on your bike, we use nice thin spokes. We build-in strength by making them thicker at the ends where stresses are higher.
  • Resistance to the ElementsOur custom-built wheel hubs use sealed cartridge bearings to resist to dirt and water.


Schwalbe Kojak Tires


Light and fast tires with enough volume to keep things comfy. Kojak’s are ideal for fast commutes or longish weekend rides.


Shimano Tiagra 2 x 10 Drivetrain


To give you awesome climbing gears while maintaining downhill speed, we pair an 11-32T cassette, compact double 50/34T crankset, and Shimano Tiagra derailleurs.


Magnetix™ 2.0


The Magnetix 2.0 uses powerful magnets to keep your bike folded for situations like carrying your bike up and down stairs. With a pull force 10-15 Kgf, the Magnetix 2.0 will keep your bike folded even when being jostled and moved about.


Luggage Socket™


Fix the Tern Luggage Truss to the Luggage Socket and you can plug in your choice of front luggage: rack, basket, or bag. If it’s KlickFix compatible, it’ll work.


Pedal Holder


Our bikes come loaded with lots of wow features, but one of our enduring favorites is the quick-release pedal. Once removed, it gives you a smaller and more maneuverable folded package. This under-saddle pedal holder lets you keep your free-floating pedal conveniently at hand.

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